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babyskitt
18.09.2019 •
Mathematics
2. find the circumference of the circle to the nearest foot.
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Ответ:
0.647 = 64.7% probability that none of them has lost electricity in his/her household
Step-by-step explanation:
For each household, there are only two possible outcomes. Either they lost electricity, or they did not. The probability of a household losing electricity is independent of any other household. This means that the binomial probability distribution is used to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
In which
is the number of different combinations of x objects from a set of n elements, given by the following formula.
And p is the probability of X happening.
A rainstorm in Portland, Oregon, has wiped out the electricity in about 7% of the households in the city.
This means that![p = 0.07](/tpl/images/1221/2964/7de97.png)
6 members
This means that![n = 6](/tpl/images/1221/2964/bc95f.png)
What is the probability that none of them has lost electricity in his/her household?
This is P(X = 0). So
0.647 = 64.7% probability that none of them has lost electricity in his/her household